Similar to the orange one with the swoops but I like the idea of having small headlines at the top.
NOTE: I love this one, but it might be because it is about pets. This is the newsletter that gave me the idea to try incorporating more "color" by adding light gray. That color was prominent in their brand rollout.
HTML newsletter design - Google Search
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Home Inspection & Inspector - Newsletter Template Design
Child Care and Preschool Newsletter Design Template by StockLayouts